Mbsmpro

Bitzer 6G-30.2Y: The High-Performance 30 HP Semi-Hermetic Compressor for Industrial Freezing

When it comes to heavy-duty industrial refrigeration and commercial freezing, reliability and displacement capacity are non-negotiable. The Bitzer 6G-30.2Y semi-hermetic reciprocating compressor stands out as a premier industry workhorse, delivering a robust 30 HP capacity engineered specifically to handle demanding low-temperature applications.

Key Technical Specifications

Based on the official manufacturer nameplate data, this 6-cylinder compressor is optimized for maximum volumetric efficiency:

• Model Type: Bitzer 6G-30.2Y (6-Cylinder)
• Displacement (Fördervol.:) * 126.8 m³/h at 50 Hz ($1450\text{ min}^{-1}$)
  • 152.9 m³/h at 60 Hz ($1750\text{ min}^{-1}$)
• Electrical Characteristics:
  • Voltage (3-Phase): 380-420V at 50 Hz / 440-480V at 60 Hz
  • Maximum Operating Current ($I_{\max}$): 53 A
  • Starting Current: 135 A (Y) / 220 A (YY) Part-Winding Start
• Pressure Limitations: Low Pressure / High Pressure (ND/HD) max. 19 / 28 bar
• Enclosure Protection: IP54
• Motor Protection Device: Integrated INT60 Kriwan electronic module for thermal monitoring

Engineered for Low-Temperature Freezing

The “Y” suffix in the model identifier denotes compatibility with Polyolester (POE) oil, making this unit ideally suited for modern, environmentally friendly hydrofluorocarbon (HFC) refrigerants such as R404A, R507A, or R448A/R449A.

With a displacement of 126.8 m³/h at standard 50 Hz grids, it moves massive volumes of refrigerant vapor smoothly. This high displacement rate ensures rapid pull-down times in walk-in blast freezers, cold storage warehouses, and industrial food processing lines. The 6-cylinder configuration offers internal dynamic balancing, minimizing vibration and mechanical wear compared to smaller, fewer-cylinder alternatives.

Advanced Protection and Control Wiring

The electrical terminal box features a robust 6-pin arrangement configured for Part-Winding (Y/YY) starting. This setup significantly reduces the high inrush starting current (dropping it from 220 A down to 135 A), preventing voltage dips in the local power grid during startup.

Additionally, the factory-installed Kriwan INT60 motor protection module connects directly to embedded PTC thermistors within the motor windings. If the internal temperature exceeds safe operating thresholds or experiences a phase failure, the control circuit cuts power instantly, protecting your high-value asset from catastrophic motor burnout.